Estimation of Groundwater Recharge in Junggwae-Boeun Area in Ulsan City Using the Water Balance and Hydrogeological Analyses

물수지 및 수리지질 분석을 통한 울산광역시 중괘천-보은천 지역의 지하수 함양량 산정

  • An, Jeong-Hoon (Division of Earth Environmental System, Pusan National University) ;
  • Hamm, Se-Yeong (Division of Earth Environmental System, Pusan National University) ;
  • Lee, Jeong-Hwan (Division of Earth Environmental System, Pusan National University) ;
  • Kim, Nam-Hoon (Division of Earth Environmental System, Pusan National University) ;
  • Yang, Dae-Bok (Division of Earth Environmental System, Pusan National University) ;
  • Hwang, Jee-Gwang (Yeongnam Regional Office, Korea Rail Network Authority)
  • 안정훈 (부산대학교 지구환경시스템학부) ;
  • 함세영 (부산대학교 지구환경시스템학부) ;
  • 이정환 (부산대학교 지구환경시스템학부) ;
  • 김남훈 (부산대학교 지구환경시스템학부) ;
  • 양대복 (부산대학교 지구환경시스템학부) ;
  • 황지광 (한국철도시설공단 영남지역본부)
  • Published : 2008.08.28

Abstract

Estimation of groundwater recharge is one of the most critical issues in sustainable management of groundwater resources. This study estimated groundwater recharge in the Junggwae-Boeun area in Ulsan City, by using the water balance and hydrogeological characteristics of geology and soil. Evapotranspiration was computed by using the Thornthwaite method, and direct runoff was determined by using the SCS-CN technique. Groundwater recharge was obtained as 266 mm/a (20.6% of the average annual precipitation, 1296 mm/a), with 779 mm/a (60.1%) of evapotranspiration and 119 mm/a (9.2%) of direct runoff. Precipitation and groundwater recharge was highly correlated, comparing with the relationships between precipitation and evapotranspiration, and between precipitation and direct runoff. This fact indicates that groundwater recharge responds more sensitively to precipitation than evapotranspiration and direct runoff do.

지하수 함양량 산정은 지하수자원의 효율적인 관리 측면에서 매우 중요하다. 본 연구에서는 물수지분석법과 연구지역의 지질과 토양의 수리지질학적 특성을 이용하여 울산광역시 중괘천-보은천 지역의 지하수 함양량을 산정하였다. 증발산량은 Thornthwaite 방법으로 계산하였으며, 직접유출량은 SCS-CN 방법으로 산정하였다. 지하수 함양량은 266 mm/년로 30년 평균 강수량 1296 mm/년의 20.6%에 해당하며, 증발산량은 779 mm/년 (60.1%), 직접유출량은 119 mm/년 (9.2%)로 산정되었다. 강수량과 지하수 함양량 간에는 강수량과 증발산량, 강수량과 직접유출량에 비해 상관성이 높게 나타난다. 이는 증발산량 및 직접유출량 보다 지하수 함양량이 강수량에 대해서 더 민감하게 반응한다는 것을 지시한다.

Keywords

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